fixing typo: it's -> its

Author: Aaron Beckerman

remotes/index.html

@@ -280,7 +280,7 @@ <h2>
 </pre>
 
     <p>Pretty easy. Now if someone clones that repository they will get exactly
-    what I have committed and all of it's history.</p>
+    what I have committed and all of its history.</p>
 
     <p>What if I have a topic branch like the 'erlang' branch we created earlier
     and I just want to share that?  You can just push that branch instead.